National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection

Metadata Updated: May 7, 2021

The USGS National Hydrography Dataset (NHD) Downloadable Data Collection from The National Map (TNM) is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of surface water (lakes, ponds, and reservoirs), paths through which water flows (canals, ditches, streams, and rivers), and related entities such as point features (springs, wells, stream gages, and dams). The information encoded about these features includes classification and other characteristics, delineation, geographic name, position and related measures, a "reach code" through which other information can be related to the NHD, and the direction of water flow. The network of reach codes delineating water and transported material flow allows users to trace movement in upstream and downstream directions. In addition to this geographic information, the dataset contains metadata that supports the exchange of future updates and improvements to the data. The NHD supports many applications, such as making maps, geocoding observations, flow modeling, data maintenance, and stewardship. For additional information on NHD, go to https://www.usgs.gov/core-science-systems/ngp/national-hydrography.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Collection

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Dates

Metadata Date November 13, 2020
Metadata Created Date November 10, 2020
Metadata Updated Date May 7, 2021
Reference Date(s) January 1, 2020 (publication)
Frequency Of Update irregular

Metadata Source

Harvested from USGS National Hydrography Dataset (NHD) Downloadable Data Collection Harvest Source

Graphic Preview

Thumbnail JPG image

Additional Metadata

Resource Type Dataset
Metadata Date November 13, 2020
Metadata Created Date November 10, 2020
Metadata Updated Date May 7, 2021
Reference Date(s) January 1, 2020 (publication)
Responsible Party U.S. Geological Survey, National Geospatial Technical Operations Center (Point of Contact)
Contact Email
Guid
Access Constraints Use Constraints: None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of this data may no longer represent actual conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data., Access Constraints: None
Bbox East Long -64
Bbox North Lat 72
Bbox South Lat 10
Bbox West Long -179
Collection Metadata true
Coupled Resource
Frequency Of Update irregular
Graphic Preview Description Thumbnail JPG image
Graphic Preview File https://thor-f5.er.usgs.gov/ngtoc/metadata/waf/collections/browse/nhd_dillon.jpg
Graphic Preview Type JPEG
Licence No liability for content or accuracy is presumed by USGS for data.
Metadata Language eng; USA
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-179.0, 10.0], [-64.0, 10.0], [-64.0, 72.0], [-179.0, 72.0], [-179.0, 10.0]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2001-01-01

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